After updating to 0.51.0 the Buttons in the control-section of the configuration, such as restart, stop and reload groups are no longer clickable.
Update: It worked after waiting a while and clearing the cache 
After updating to 0.51.0 the Buttons in the control-section of the configuration, such as restart, stop and reload groups are no longer clickable.
Update: It worked after waiting a while and clearing the cache